What procedure removes scar tissue from the cornea with an excimer laser?
a. Refractive keratoplasty
b. Phototherapeutic keratoplasty
c. Radial keratotomy
d. Keratophakia
ANS: B
In phototherapeutic keratoplasty (PTK), scar tissue is removed from the cornea with an excimer laser. PTK restores vision that has been blocked by scars from infection, injury, or an inherited condition.
Health Professions
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A) 30 percent B) 25 percent C) 40 percent D) 15 percent
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